Piston head



UNITED STATES PATENT OFFICE.

HENRY L. F. TREBEBT, OF WEST BLOOMFIELD, NEW

YORK, ASSIGNOR TO T-RIEBERT AIRPLANE MOTOR COMPANY, INQ, OF PENN NEWYORK, A. CORPORATION OF NEW YORK.

rIs'roN' 1mm.

Original application filed August 27, 1917, Cerial No. 188,342. Dividedand 1921. Serial No. 488,796.

To all whoa'n it may concern:

Be it known that I, HENRY L. F. TRnBnR r, of West Bloomfield, in thecounty of Ontano and State of New York,have invented certain new anduseful Improvements in Piston Heads; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming a part of thisspecification, and to the reference numerals marked thereon.

My present invention relates to engmes, being particularly useful inconnectlon with internal combustmn engines, and it has for its' objectto provide an improved piston head for such engines provided with asimple and serviceable means for insuring a uniform application oflubricating oil to the cylinder walls and in proper quantity. To theseand other ends the invention consists in certain improvements andcombinations of parts, all as will be hereinafter more fully described,the novel features being pointed out in the specification.

In the drawings: Figure 1 is a vertical central section through afragment of an engine cylinder showing in similar section a piston headconstructed in accordance with and illustrating one embodiment of myinvention, and

Figure 2 is a bottom view of the piston taken in horizontal sectionthrough the cylinder.

Similar reference numerals throughout the several views indicate thesame parts.

My present improvements are particularly applicable to rotary engines ofthe type shown in my pending application Serial No. 188,342, filedAugust 27, 1917 ,of which this is a division. Such engines embodycylinders having their axes radial to the axis of rotation of theengine, and difiiculties are ordinarily experienced in lubricating allparts of the engine, and the cylinder walls in particular, because ofthe centrifugal force acting upon the oil within the crank case. Themore usual tendency is for an excess of oil to be thrown toward the headof the cylinder forcing itself past the pistons and clogging the valvein the head and being wasted.

Specification of Letters Patent.

claims at the end of the f Patented Apr. 11, 1922.

Referring more particularl to the drawlngs', 1 indicates an air coolecylinder castd er head and 4.- the valve cage and seat. Reciprocatinglin the cylinder is a piston head 5 having t e usual central hub or boss6 for the attachment'of the connecting rod, except that in 1s nowristpin, the connecting rod bein r1gidly attached to the piston. Theshanfi of such connecting rod is present embodiment at 7. cylindrical asat 8 and or boss 6 against which an enlargement or shoulder 9 below thecylindrical portion 8 abuts on the under side of the piston. A reducedthreaded extension 10 above the portion 8 receives a nut that arescrewed down against the upper or outer side of the iston to secure itto the connecting rod. elow the shoulder 9 is a further enlargement inthe form of an annular shoulder or indicated in the its upper end iserred to.

Thepiston skirt 14: contains the usual rings 15 and at its lower edge isformed with an annular groove or channel 16 forminga seat, the bottomwall of which is in- 80 clined in a direction toward the base of thecylinder as shown. in this seat I place an absorbent ring 17 preferablyof felt or similar material. This ring is engaged by the peripheral edgeof a perforated disk or dia- 85 phragm 18 that is dished or sprungoutwardly at its center toward the base of the cylinder and there restsagainst the shoulder 13 by which it is retained. This diaphragm ispreferably applied under it is sprung slightly by the the cylinder headover it in assembling the parts so that the edge of the diaphragm bitesinto the ring 17 and securely retains it.

In operation the ring 17 traversing the cylinder wall and spreading theoil evenly and preventing an excess thereof from working past thepiston. The disk or diaphragm l8 aside from its funcapplication of tionof merely retaining the ring 17 and re 1 it radially toward the ring 17at all points this application filed August 1,

the type of engine shown there fits intothe hub 11 and washer 12 collar13 hereinafter retension, that is acts as a wiper .cupying the seatinclination of the diaphragm itself.

.I claim as my invention: 1. In a piston head for internal combustionengines, the combination with a piston skirt having an annular seattherein at its lower edge, of an absorbent wiper ring 00- for contactwith the cylinder walls.

2. In a piston head for internal combustion engines, the combinationwith a piston skirt having an annular seat therein at its lower edge, ofan absorbent wiper ring occupying the seat for contact with the cylinderwalls, and means mounted independentlyof the skirt for pressing the ringagainst the seat and cylinder walls. I

3. In a piston head for internal combustion engines, the combinationwith a piston skirt having skirt having an annular seat therein at itslower edge, of an absorbent wiper ring occupying'the seat for contactwith the cylinder walls, and means for deflecting oil from the direction0? the center of the piston and its cylinder to said ring.

HENRY L. E; TREBERTI adapted to direct oil to

